AC3 Passthrough (5.1 Surround Sound)

1. Enable Dolby Pro Logic

Ensure 'Dolby Pro Logic' is selected in System Preferences --> Perian under Audio Options.


2. Connect your receiver.

Audio connection must be a digital connection (optical or HDMI).

3. Change sample rate to 48KHz.

  1. Open the 'Audio MIDI Setup' app located in the '/Applications/Utilities' folder.
  2. Source should be set to 'Digital Out' 
  3. Change the format to 48000.0 Hz, and 2ch-16bit


4. Check receiver settings.

Some receivers have an encoding setting. (example: some Sony receivers need to be changed from DEC PCM to DEC AUTO)

5. Check Front Row settings

Enable AC3 Passthrough in Front Row via Media --> Settings menu.

6. Enjoy full 5.1 surround sound!

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